方法1：
【使用spring自带BeanUtils实现克隆】
【要求：需要被克隆的类实现Cloneable接口并且重写clone()方法】
》例子：
》》实体：
package com.agen.orderdiscount.entity; import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;
import org.hibernate.annotations.GenericGenerator; import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import java.util.Date; /**
* 预估金额
* 订单创建成功 往预估金额表中存入记录
* @author SXD
* @date 2018/1/16
*/
@Data(staticConstructor = "of")
@NoArgsConstructor
@AllArgsConstructor
@Accessors(chain = true)
@Entity
@GenericGenerator(name = "uuid2", strategy = "org.hibernate.id.UUIDGenerator" )
public class EsAmount implements Cloneable{ /**
* 预估ID
*/
@Id
@GeneratedValue(generator = "uuid2")
@Column(length = 36)
private String Id;
/**
* 本次转入预估金额
*/
@Column(nullable = false,precision = 10,scale = 2)
private Double esAccount;
/**
* 本次转入时间
*/
@Column(nullable = false)
private Date esDate;
/**
* 订单ID
*/
@Column(nullable = false)
private Integer orderId;
/**
* 订单编号SN
*/
@Column(nullable = false,length = 20)
private String orderSn;
/**
* 机构ID
*/
@Column(nullable = false)
private Integer adminId;
/**
* 产品ID
*/
@Column(nullable = false)
private Integer productId;
/**
* 会员ID
*/
@Column(nullable = false)
private Integer memberId;
/**
* 采样包ID
*/
@Column(nullable = false)
private Integer cybId;
/**
* 操作来源
*/
@Column(nullable = false,length = 20)
private String esOperater;
/**
* 预估金额备注1
*/
@Column(length = 500)
private String esCre1;
/**
* 预估金额备注2
*/
@Column(length = 500)
private String esCre2; @Override
protected Object clone() throws CloneNotSupportedException {
return super.clone();
} }
》》使用：
EsAmount esAmount = esAmountRepository.findEsAmountByAdminIdAndOrderIdAndProductId(adminId,orderId,productId);
if(Objects.nonNull(esAmount)){
//1.1 将预估金额扣除到可提现金额的记录也记录到预估金额记录表中
EsAmount esAmount1 = new EsAmount();
BeanUtils.copyProperties(esAmount,esAmount1);
if(Objects.nonNull(esAmount1)){
BeanUtils.copyProperties(esAmount,esAmount1); 将参数1克隆一份给参数2
=====================================================================================
方法2：
【使用java.lang.Serializable实现深度克隆】
【要求，不需要类实现Cloneable，只需要它们实现java.lang.Serializable即可】
》工具类：
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
public abstract class BeanUtil {
@SuppressWarnings("unchecked")
public static <T> T cloneTo(T src) throws RuntimeException {
ByteArrayOutputStream memoryBuffer = new ByteArrayOutputStream();
ObjectOutputStream out = null;
ObjectInputStream in = null;
T dist = null;
try {
out = new ObjectOutputStream(memoryBuffer);
out.writeObject(src);
out.flush();
in = new ObjectInputStream(new ByteArrayInputStream(memoryBuffer.toByteArray()));
dist = (T) in.readObject();
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
if (out != null)
try {
out.close();
out = null;
} catch (IOException e) {
throw new RuntimeException(e);
}
if (in != null)
try {
in.close();
in = null;
} catch (IOException e) {
throw new RuntimeException(e);
}
}
return dist;
}
}
》使用：
Administrator src = new Administrator(new User("Kent", "123456", new Date()), true);
Administrator dist = BeanUtil.cloneTo(src);=====================================================================================